Is there a way a way to remove the textures seen on MultiBarBottomLeft, MultiBarBottomRight, and MultiBarRight?
Always Show ActionBars is unticked. I know /reload hides them, but is there not a script that removes them so I do not have to /reload all the time :-D

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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh

Is this an occasional bug or is it always like this? You said it fixes itself after a reload.

You could try calling MultiActionBar_HideAllGrids() or, if that doesn't do it, loop through every action button and do something like "if not HasAction(button.action) then button:SetAttribute("showgrid",0) button:Hide() end".

It is an occasional bug that occurs on random stuff like accepting/completing a quest.
And ehh.. I'm not really that sharp at writing code, could you write the above more in-depth?

Sorry, I meant to hook the metatable, let me edit that. It should work for every action button, however it won't do anything until their SetAttribute method is called, so they need to be hidden initially and then this is just to fix it if it changes later.

Alternatively you could try just outright setting the alpha of every texture to 0.. the textures don't appear to be named so you have to loop over button:GetRegions().

You're going to have to fine-tune this to only hide what you want hidden but something like this and then maybe check if the texture path contains UI-QuickSlot..

Sorry, I meant to hook the metatable, let me edit that. It should work for every action button, however it won't do anything until their SetAttribute method is called, so they need to be hidden initially and then this is just to fix it if it changes later.

Great! They are hidden initially so I bet it will work.
I will test it tomorrow it is getting late here :-)
Thank you so far!

This on the other hand worked very well, BUT the problem is it is impossible to put at spell from the spellbook etc. down to the Action Bar, since the textures never appear.
So if there could be added a condition to only hide when not dragging anything (such as a macro, ability, trinket, etc.) then it would work very well :-)